Baldwin B50 vs WIX 51051: Oil Filter Compatibility
Compare Baldwin B50 and WIX 51051 oil filters by compatibility, dimensions, thread size, gasket fit, bypass valve, anti-drainback valve status, and match confidence. Use this comparison as a fitment review, not as an automatic substitution guarantee. Both use a 5/8-18 thread.
Quick verdict
Candidate adds internal bypass; usually redundant with engine-mounted bypass · Candidate adds ADBV
- Thread size is the first hard-fit check for any comparison of spin-on filters.
- Gasket OD and gasket ID are the most important seal-related dimensions.
- Height differences can matter for clearance even when thread and gasket fit appear close.
- Bypass and anti-drainback differences may be important, depending on the application.
Baldwin B50 and WIX 51051 specifications
How matching is scored| Specification | Baldwin B50 | WIX 51051 |
|---|---|---|
| Thread size | 5/8-18 | 5/8-18 |
| Gasket OD | 71.4 mm | 71.98 mm |
| Gasket ID | 62.7 mm | 62.53 mm |
| Can OD | 93.7 mm | 92.96 mm |
| Height | 136.5 mm | 110.2 mm |
| Internal bypass valve | No | Yes |
| Bypass PSID | Not applicable | 8 - 11 |
| Anti-drainback valve | No | Yes |
What matters in this specific comparison
Thread size matches: both are 5/8-18.
Gasket OD differs by 0.6 mm (Baldwin B50: 71.4 mm, WIX 51051: 71.98 mm).
Gasket ID differs by 0.2 mm (Baldwin B50: 62.7 mm, WIX 51051: 62.53 mm).
Baldwin B50 is 26.3 mm taller (Baldwin B50: 136.5 mm, WIX 51051: 110.2 mm) -- check clearance before substituting.
Can OD differs by 0.7 mm (Baldwin B50: 93.7 mm, WIX 51051: 92.96 mm).
Bypass valve presence differs: WIX 51051 has one, Baldwin B50 does not.
Open related filters
Before substituting, verify thread fit, gasket sealing dimensions, height clearance, bypass behavior, and anti-drainback requirements for your specific application.